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Finding the Fourth Proportional to 515,615.20, 772,766.70 and 248,801.20

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Solution

The fourth proportional to 515,615.20, 772,766.70 and 248,801.20 is: 372,885.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,615.20 : 772,766.70 = 248,801.20 : x
  2. Step 2: Convert to fraction form
    515,615.20/772,766.70 = 248,801.20/x
  3. Step 3: Cross multiply
    515,615.20x = 772,766.70 × 248,801.20
  4. Step 4: Simplify right side
    515,615.20x = 192,265,282,280.04
  5. Step 5: Solve for x
    x = 192,265,282,280.04/515,615.20
  6. Step 6: Final answer
    x = 372,885.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.